Hyperspectral Mineral Mapping in Support of Geothermal Exploration: Examples from Long Valley Caldera, CA and Dixie Valley, NV, USA (open access)

Hyperspectral Mineral Mapping in Support of Geothermal Exploration: Examples from Long Valley Caldera, CA and Dixie Valley, NV, USA

Growing interest and exploration dollars within the geothermal sector have paved the way for increasingly sophisticated suites of geophysical and geochemical tools and methodologies. The efforts to characterize and assess known geothermal fields and find new, previously unknown resources has been aided by the advent of higher spatial resolution airborne geophysics (e.g. aeromagnetics), development of new seismic processing techniques, and the genesis of modern multi-dimensional fluid flow and structural modeling algorithms, just to name a few. One of the newest techniques on the scene, is hyperspectral imaging. Really an optical analytical geochemical tool, hyperspectral imagers (or imaging spectrometers as they are also called), are generally flown at medium to high altitudes aboard mid-sized aircraft and much in the same way more familiar geophysics are flown. The hyperspectral data records a continuous spatial record of the earth's surface, as well as measuring a continuous spectral record of reflected sunlight or emitted thermal radiation. This high fidelity, uninterrupted spatial and spectral record allows for accurate material distribution mapping and quantitative identification at the pixel to sub-pixel level. In volcanic/geothermal regions, this capability translates to synoptic, high spatial resolution, large-area mineral maps generated at time scales conducive to both the faster pace of …
Date: March 3, 2004
Creator: Pickles, W. L.; Martini, B. A.; Silver, E. A. & Cocks, P. A.
Object Type: Article
System: The UNT Digital Library
Hyperspectral Mineral Mapping in Support of Geothermal Exploration: Examples from Long Valley Caldera, CA and Dixie Valley, NV, USA (open access)

Hyperspectral Mineral Mapping in Support of Geothermal Exploration: Examples from Long Valley Caldera, CA and Dixie Valley, NV, USA

Growing interest and exploration dollars within the geothermal sector have paved the way for increasingly sophisticated suites of geophysical and geochemical tools and methodologies. The efforts to characterize and assess known geothermal fields and find new, previously unknown resources has been aided by the advent of higher spatial resolution airborne geophysics (e.g. aeromagnetics), development of new seismic processing techniques, and the genesis of modern multi-dimensional fluid flow and structural modeling algorithms, just to name a few. One of the newest techniques on the scene, is hyperspectral imaging. Really an optical analytical geochemical tool, hyperspectral imagers (or imaging spectrometers as they are also called), are generally flown at medium to high altitudes aboard mid-sized aircraft and much in the same way more familiar geophysics are flown. The hyperspectral data records a continuous spatial record of the earth's surface, as well as measuring a continuous spectral record of reflected sunlight or emitted thermal radiation. This high fidelity, uninterrupted spatial and spectral record allows for accurate material distribution mapping and quantitative identification at the pixel to sub-pixel level. In volcanic/geothermal regions, this capability translates to synoptic, high spatial resolution, large-area mineral maps generated at time scales conducive to both the faster pace of …
Date: March 25, 2004
Creator: Martini, B; Silver, E; Pickles, W & Cocks, P
Object Type: Article
System: The UNT Digital Library
Evaluations of Radionuclides of Uranium, Thorium, and Radium Associated With Produced Fluids, Precipitates, and Sludges From Oil, Gas, and Oilfield Brine Injection Wells in Mississippi: Final Report (open access)

Evaluations of Radionuclides of Uranium, Thorium, and Radium Associated With Produced Fluids, Precipitates, and Sludges From Oil, Gas, and Oilfield Brine Injection Wells in Mississippi: Final Report

Naturally occurring radioactive materials (NORM) are known to be produced as a byproduct of hydrocarbon production in Mississippi. The presence of NORM has resulted in financial losses to the industry and continues to be a liability as the NORM-enriched scales and scale encrusted equipment is typically stored rather than disposed of. Although the NORM problem is well known, there is little publically available data characterizing the hazard. This investigation has produced base line data to fill this informational gap. A total of 329 NORM-related samples were collected with 275 of these samples consisting of brine samples. The samples were derived from 37 oil and gas reservoirs from all major producing areas of the state. The analyses of these data indicate that two isotopes of radium ({sup 226}Ra and {sup 228}Ra) are the ultimate source of the radiation. The radium contained in these co-produced brines is low and so the radiation hazard posed by the brines is also low. Existing regulations dictate the manner in which these salt-enriched brines may be disposed of and proper implementation of the rules will also protect the environment from the brine radiation hazard. Geostatistical analyses of the brine components suggest relationships between the concentrations of …
Date: March 1, 2004
Creator: Swann, Charles; Matthews, John; Ericksen, Rick & Kuszmaul, Joel
Object Type: Report
System: The UNT Digital Library
Gas Analysis of Geothermal Fluid Inclusions: A New Technology For Geothermal Exploration (open access)

Gas Analysis of Geothermal Fluid Inclusions: A New Technology For Geothermal Exploration

To increase our knowledge of gaseous species in geothermal systems by fluid inclusion analysis in order to facilitate the use of gas analysis in geothermal exploration. The knowledge of gained by this program can be applied to geothermal exploration, which may expand geothermal production. Knowledge of the gas contents in reservoir fluids can be applied to fluid inclusion gas analysis of drill chip cuttings in a similar fashion as used in the petroleum industry. Thus the results of this project may lower exploration costs both in the initial phase and lower drill hole completion costs. Commercial costs for fluid inclusion analysis done on at 20 feet intervals on chip samples for 10,000 ft oil wells is about $6,000, and the turn around time is a few weeks.
Date: March 9, 2004
Creator: Norman, David I. & Moore, Joseph
Object Type: Report
System: The UNT Digital Library
DEVELOPMENT PRACTICES FOR OPTIMIZED MEOR IN SHALLOW HEAVY OIL RESERVOIRS (open access)

DEVELOPMENT PRACTICES FOR OPTIMIZED MEOR IN SHALLOW HEAVY OIL RESERVOIRS

The objective of this research project is to demonstrate an economically viable and sustainable method of producing shallow heavy oil reserves in western Missouri and southeastern Kansas, using an integrated approach including surface geochemical surveys, conventional MEOR treatments, horizontal fracturing in vertical wells, electrical resistivity tomography (ERT), and reservoir simulation to optimize the recovery process. The objective also includes transferring the knowledge gained from the project to other local landowners, to demonstrate how they may identify and develop their own heavy oil resources with little capital investment. The first year period was divided into two phases--Phase I and Phase II. Each phase was 6 months in duration. Tasks completed in first six month period included soil sampling, geochemical analysis, construction of ERT arrays, collection of background ERT surveys, and analysis of core samples to develop a geomechanical model for designing the hydraulic fracturing treatment. Five wells were to be drilled in phase I. However, weather and funding delays resulted in drilling shifting to the second phase of the project. During the second six month period, five vertical wells were drilled through the Bluejacket and Warner Sands. These wells were drilled with air and logged openhole. Drilling locations were selected after …
Date: March 1, 2004
Creator: Dunn-Norman, Shari
Object Type: Report
System: The UNT Digital Library
Vadose Zone Remediation of CO2 Leakage from Geologic CO2 Storage Sites (open access)

Vadose Zone Remediation of CO2 Leakage from Geologic CO2 Storage Sites

In the unlikely event that CO2 leakage from deep geologic CO2 sequestration sites reaches the vadose zone, remediation measures for removing the CO2 gas plume may have to be undertaken. Carbon dioxide leakage plumes are similar in many ways to volatile organic compound (VOC) vapor plumes, and the same remediation approaches are applicable. We present here numerical simulation results of passive and active remediation strategies for CO2 leakage plumes in the vadose zone. The starting time for the remediation scenarios is assumed to be after a steady-state CO2 leakage plume is established in the vadose zone, and the source of this plume has been cut off. We consider first passive remediation, both with and without barometric pumping. Next, we consider active methods involving extraction wells in both vertical and horizontal configurations. To compare the effectiveness of the various remediation strategies, we define a half-life of the CO2 plume as a convenient measure of the CO2 removal rate. For CO2 removal by passive remediation approaches such as barometric pumping, thicker vadose zones generally require longer remediation times. However, for the case of a thin vadose zone where a significant fraction of the CO2 plume mass resides within the high liquid saturation …
Date: March 3, 2004
Creator: Zhang, Yingqi; Oldenburg, Curtis M. & Benson, Sally M.
Object Type: Article
System: The UNT Digital Library
Cherokeean Herald (Rusk, Tex.), Vol. 155, No. 6, Ed. 1 Wednesday, March 31, 2004 (open access)

Cherokeean Herald (Rusk, Tex.), Vol. 155, No. 6, Ed. 1 Wednesday, March 31, 2004

Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date: March 31, 2004
Creator: Whitehead, Marie
Object Type: Newspaper
System: The Portal to Texas History
Slipstream, Volume 53, Number 3, March 2004 (open access)

Slipstream, Volume 53, Number 3, March 2004

Monthly magazine published by the Maverick Region of the Porsche Club of America containing stories related to the organization or of interest to the group's members including news, upcoming and past events, other feature articles, and classified advertisements.
Date: March 2004
Creator: Porsche Club of America. Maverick Region.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
North Texas Daily (Denton, Tex.), Vol. 88, No. 93, Ed. 1 Wednesday, March 24, 2004 (open access)

North Texas Daily (Denton, Tex.), Vol. 88, No. 93, Ed. 1 Wednesday, March 24, 2004

Daily student newspaper from the University of North Texas in Denton, Texas that includes local, state and campus news along with advertising.
Date: March 24, 2004
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
The Dublin Citizen (Dublin, Tex.), Vol. 14, No. 30, Ed. 1 Thursday, March 25, 2004 (open access)

The Dublin Citizen (Dublin, Tex.), Vol. 14, No. 30, Ed. 1 Thursday, March 25, 2004

Weekly newspaper from Dublin, Texas that includes local, state, and national news along with advertising.
Date: March 25, 2004
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Citizens' Advocate (Coppell, Tex.), Vol. 20, No. 10, Ed. 1 Friday, March 5, 2004 (open access)

Citizens' Advocate (Coppell, Tex.), Vol. 20, No. 10, Ed. 1 Friday, March 5, 2004

Weekly newspaper from Coppell, Texas that includes local, state, and national news along with advertising.
Date: March 5, 2004
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
The Brand (Abilene, Tex.), Vol. 91, No. 11, Ed. 1, Tuesday, March 2, 2004 (open access)

The Brand (Abilene, Tex.), Vol. 91, No. 11, Ed. 1, Tuesday, March 2, 2004

Weekly student newspaper from Hardin-Simmons University in Abilene, Texas that includes local, state and campus news along with advertising.
Date: March 2, 2004
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 108, No. 37, Ed. 1 Wednesday, March 24, 2004 (open access)

The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 108, No. 37, Ed. 1 Wednesday, March 24, 2004

Weekly newspaper from Goldthwaite, Texas that includes local, state, and national news along with extensive advertising.
Date: March 24, 2004
Creator: Bridges, G. Frank & Bridges, Georgie
Object Type: Newspaper
System: The Portal to Texas History
Oral History Interview with Eli Escobar, March 9, 2004 (open access)

Oral History Interview with Eli Escobar, March 9, 2004

The National Museum of the Pacific War presents an interview with Eli Escobar. Escobar was drafted into the Army in May 1944. When Escobar arrived in France in November, 1944, he joined Company K, 242nd Infantry Regiment, 42nd Infantry Division. In January, 1945, Escobar got captured by German troops near Haguenau. He spent the remainder of the war as a prisoner of war. He was liberated in late April and returned to the US. Escobar was discharged in November, 1945.
Date: March 9, 2004
Creator: Escobar, Eli
Object Type: Text
System: The Portal to Texas History
Texas Parks & Wildlife, Volume 62, Number 3, March 2004 (open access)

Texas Parks & Wildlife, Volume 62, Number 3, March 2004

Magazine discussing natural resources, parks, hunting and fishing, and other information related to the outdoors in Texas.
Date: March 2004
Creator: Texas. Parks and Wildlife Department.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Cooper Review (Cooper, Tex.), Vol. 124, No. 13, Ed. 1 Thursday, March 25, 2004 (open access)

Cooper Review (Cooper, Tex.), Vol. 124, No. 13, Ed. 1 Thursday, March 25, 2004

Weekly newspaper from Cooper, Texas that includes local, state, and national news along with advertising.
Date: March 25, 2004
Creator: Pinson, Beth
Object Type: Newspaper
System: The Portal to Texas History
The Albany News (Albany, Tex.), Vol. [128], No. [41], Ed. 1 Thursday, March 18, 2004 (open access)

The Albany News (Albany, Tex.), Vol. [128], No. [41], Ed. 1 Thursday, March 18, 2004

Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date: March 18, 2004
Creator: Lucas, Melinda L.
Object Type: Newspaper
System: The Portal to Texas History
Cooper Review (Cooper, Tex.), Vol. 124, No. 12, Ed. 1 Thursday, March 18, 2004 (open access)

Cooper Review (Cooper, Tex.), Vol. 124, No. 12, Ed. 1 Thursday, March 18, 2004

Weekly newspaper from Cooper, Texas that includes local, state, and national news along with advertising.
Date: March 18, 2004
Creator: Pinson, Beth
Object Type: Newspaper
System: The Portal to Texas History
Comanche Chief (Comanche, Tex.), No. 47, Ed. 1 Thursday, March 25, 2004 (open access)

Comanche Chief (Comanche, Tex.), No. 47, Ed. 1 Thursday, March 25, 2004

Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date: March 25, 2004
Creator: Wilkerson, James C., III
Object Type: Newspaper
System: The Portal to Texas History
The Dublin Citizen (Dublin, Tex.), Vol. 14, No. 29, Ed. 1 Thursday, March 18, 2004 (open access)

The Dublin Citizen (Dublin, Tex.), Vol. 14, No. 29, Ed. 1 Thursday, March 18, 2004

Weekly newspaper from Dublin, Texas that includes local, state, and national news along with advertising.
Date: March 18, 2004
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Oral History Interview with Eli Escobar, March 9, 2004 transcript

Oral History Interview with Eli Escobar, March 9, 2004

The National Museum of the Pacific War presents an interview with Eli Escobar. Escobar was drafted into the Army in May 1944. When Escobar arrived in France in November, 1944, he joined Company K, 242nd Infantry Regiment, 42nd Infantry Division. In January, 1945, Escobar got captured by German troops near Haguenau. He spent the remainder of the war as a prisoner of war. He was liberated in late April and returned to the US. Escobar was discharged in November, 1945.
Date: March 9, 2004
Creator: Escobar, Eli
Object Type: Sound
System: The Portal to Texas History
Citizens' Advocate (Coppell, Tex.), Vol. 20, No. 12, Ed. 1 Friday, March 19, 2004 (open access)

Citizens' Advocate (Coppell, Tex.), Vol. 20, No. 12, Ed. 1 Friday, March 19, 2004

Weekly newspaper from Coppell, Texas that includes local, state, and national news along with advertising.
Date: March 19, 2004
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Oil and Gas Exploration and Development on Public Lands (open access)

Oil and Gas Exploration and Development on Public Lands

None
Date: March 26, 2004
Creator: Humphries, Marc
Object Type: Report
System: The UNT Digital Library
Selected Legal and Policy Issues Related to Coalbed Methane Development (open access)

Selected Legal and Policy Issues Related to Coalbed Methane Development

None
Date: March 9, 2004
Creator: unknown
Object Type: Report
System: The UNT Digital Library